NEW ORLEANS — Hurricane Ida, the first Atlantic hurricane to target the United States this year, plodded Sunday toward the Gulf Coast with 105 mph winds, bringing the threat of flooding and storm surges.

A hurricane watch extended over more than 200 miles of coastline across southeastern Louisiana, Mississippi, Alabama and the Florida Panhandle. Louisiana's governor declared a state of emergency.

Authorities said Ida could make landfall as early as Tuesday morning, although it was forecast to weaken by then. Officials and residents kept a close eye on the Category 2 hurricane as it approached, though there were no immediate plans for evacuations.

Sunday night, Ida was located 400 miles south-southeast of the mouth of the Mississippi River and moving north-northwest near 14 mph. The latest forecast from the National Hurricane Center shows Ida brushing near Louisiana and Mississippi, then making landfall near Alabama before continuing across north Florida.

Yet many residents took the forecast in stride.

"Even though we're telling everybody to be prepared, my gut tells me it probably won't be that bad," said Steve Arndt, director of Bay Point Marina Co. in Panama City, Fla.

In Louisiana, Gov. Bobby Jindal had declared a state of emergency as a precaution, and the National Guard was on high alert if assistance was needed. New Orleans wasn't included in the hurricane watch.

But officials were encouraging residents to prepare for potential gusts of 60 mph by removing any tree limbs that could damage their homes and securing or bringing in any trash cans, grills, potted plants or patio furniture.

Nearly 1,400 Louisiana residents are still living in federally issued trailers and mobile homes after hurricanes Katrina and Rita; nearly 360 units remained in Mississippi.

"FEMA stresses that those in temporary (housing) units should not take chances," Federal Emergency Management Agency spokesman Andrew Thomas said. "Leave the unit behind and evacuate to a permanent structure that will better withstand tropical weather systems and the associated winds."

Mississippi authorities warned residents to be vigilant. Authorities were monitoring conditions to see whether any evacuations of lower-lying areas or school closures would be necessary.

"It is likely we will at least be hit with strong winds and some flooding in our coastal counties," said Jeff Rent, a spokesman for the Mississippi Emergency Management Agency. Officials "do not want anybody to be caught off guard."